Joe Hewitt (programmer)

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Joe Hewitt
Joe Hewitt at YUIConf in 2010
Nationality (legal)American
Known forFacebook for iPhone, Firebug, iUI, and early Firefox

Joe Hewitt is an American software programmer who is best known for his work on the Firefox web browser and related software development tools like Firebug and DOM Inspector.


His first project took place while still attending Hopatcong High School.


Hewitt created the website Feff World with Douglas Palermo.[1]

From 2000 to 2003, he worked on UI programming at Netscape.[2] Subsequently, he worked on AOL's Boxely UI project, which renders software such as AIM Triton and AOL Explorer. In July 2007, Hewitt led the release of the iUI user interface library which greatly simplified Safari development for Apple's iPhone.[3]

He has been working on Parakey with Blake Ross.[4][5] Parakey was acquired by Facebook in July 2007.[6]

In August 2007, he wrote the iPhone-specific version of Facebook. He was responsible for creating Facebook’s iPhone app,[7] which as of 2009 was the most downloaded iPhone app of all time.[7] In November 2009, Hewitt ceased development on the application, citing Apple policies.[7] In January 2009, he released the open-source library for iPhone developers Three20.[8]

In 2011, Hewitt left Facebook.[9][10]


  1. ^ Heroes and Hierophants. Retrieved 2022-10-11. {{cite book}}: |website= ignored (help)
  2. ^ "Tuning his tech chops at Facebook". Retrieved 2022-10-11.
  3. ^ "Meet Joe Hewitt, iPhone Web App Interface Guru". Wired. Retrieved 2022-10-11.
  4. ^ Todd Bishop (July 2, 2006). "Software Notebook: Mr. Firefox looks to the future". Retrieved 2011-05-08.
  5. ^ "Interview: Joe Hewitt". FOSDEM. February 12, 2007. Archived from the original on May 24, 2011. Retrieved 2011-05-08.
  6. ^ "Social site Facebook buys Parakey". BBC. July 20, 2007. Retrieved 2011-05-08.
  7. ^ a b c "Facebook iPhone Dev Quits Project Over Apple Tyranny". TechCrunch. November 11, 2009. Retrieved 2011-05-08.
  8. ^ "Joe Hewitt's Three20 project improves iPhone program". 24 March 2009. Retrieved 2022-10-11.
  9. ^ Joe Hewitt (May 6, 2011). "Creative Tools". Archived from the original on May 7, 2011. Retrieved 2011-05-08.
  10. ^ Alexia Tsotsis (May 6, 2011). "Esteemed Mobile Developer Joe Hewitt Leaves Facebook". TechCrunch. Retrieved 2011-05-08.

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